For those who miss VLTOR Weapons System accessories on their airsoft guns, there is still that option with G&P. In this review by Mach Sakai, the G&P M4A1 Sentry MAGPUL AEG which can be useful as a primary for CQB and built-up areas. The gearbox is an 8mm version and comes with a 14mm positive thread. It also features he VLTOR MUR receiver and stock.